Function to access associative arrays by string paths

array_path.php

/**
 * @param string $path The path of keys to access
 * @param array $array The array to read from
 * @param string $seperator The seperator to split the string by
 * @return array|mixed|null The requested value or null
 */
function array_path(string $path, array $array, string $seperator = ".") {
    $parts = explode($seperator, $path);
    $current = $array;

    foreach ($parts as $part) {
        if (!isset($current[$part])) {
            return null;
        }

        $current = $current[$part];
    }

    return $current;
}

$data = [
  "customers" => [
     [
        "name" => "Jhon Doe",
        "age" => 31,
     ]
  ],
  "nested" => [
    "foo" => "bar"
  ]
];

var_dump(array_path("customers.0", $data)); //array["name" => ..., "age" => ...]
var_dump(array_path("nested.foo", $data)); //string "bar"